Add support many declarative protovalidate rules (#29)

JSONSchema supports a subset of the protovalidate rules. This PR converts protovalidate rules into the associated JSONSchema rules.

.golangci.yml

@@ -43,6 +43,7 @@ linters:
     - testpackage       # internal tests are fine
     - wrapcheck         # don't _always_ need to wrap errors
     - wsl               # generous whitespace violates house style
+    - nolintlint
 issues:
   exclude-dirs-use-default: false
   exclude:

go.mod

@@ -6,17 +6,19 @@ require (
 	buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.2-20241127180247-a33202765966.1
 	github.com/bufbuild/buf v1.49.0
 	github.com/bufbuild/protoplugin v0.0.0-20240911180120-7bb73e41a54a
+	github.com/bufbuild/protovalidate-go v0.8.2
 	github.com/jhump/protoreflect v1.17.0
+	github.com/santhosh-tekuri/jsonschema/v6 v6.0.1
 	github.com/stretchr/testify v1.10.0
 	google.golang.org/protobuf v1.36.2
+	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
 	buf.build/go/protoyaml v0.3.1 // indirect
 	cel.dev/expr v0.19.1 // indirect
 	github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
 	github.com/bufbuild/protocompile v0.14.1 // indirect
-	github.com/bufbuild/protovalidate-go v0.8.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/google/cel-go v0.22.1 // indirect
@@ -30,5 +32,4 @@ require (
 	golang.org/x/text v0.21.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20250102185135-69823020774d // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20250102185135-69823020774d // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -17,6 +17,8 @@ github.com/bufbuild/protovalidate-go v0.8.2/go.mod h1:K6w8iPNAXBoIivVueSELbUeUl+
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dlclark/regexp2 v1.11.0 h1:G/nrcoOa7ZXlpoa/91N3X7mM3r8eIlMBBJZvsz/mxKI=
+github.com/dlclark/regexp2 v1.11.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/envoyproxy/protoc-gen-validate v1.1.0 h1:tntQDh69XqOCOZsDz0lVJQez/2L6Uu2PdjCQwWCJ3bM=
 github.com/envoyproxy/protoc-gen-validate v1.1.0/go.mod h1:sXRDRVmzEbkM7CVcM06s9shE/m23dg3wzjl0UWqJ2q4=
 github.com/felixge/fgprof v0.9.5 h1:8+vR6yu2vvSKn08urWyEuxx75NWPEvybbkBirEpsbVY=
@@ -45,6 +47,8 @@ github.com/pkg/profile v1.7.0 h1:hnbDkaNWPCLMO9wGLdBFTIZvzDrDfBM2072E1S9gJkA=
 github.com/pkg/profile v1.7.0/go.mod h1:8Uer0jas47ZQMJ7VD+OHknK4YDY07LPUC6dEvqDjvNo=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/santhosh-tekuri/jsonschema/v6 v6.0.1 h1:PKK9DyHxif4LZo+uQSgXNqs0jj5+xZwwfKHgph2lxBw=
+github.com/santhosh-tekuri/jsonschema/v6 v6.0.1/go.mod h1:JXeL+ps8p7/KNMjDQk3TCwPpBy0wYklyWTfbkIzdIFU=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stoewer/go-strcase v1.3.0 h1:g0eASXYtp+yvN9fK8sH94oCIk0fau9uV1/ZdJ0AVEzs=